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IPCC: Expert Review of Second Order Draft of the IPCC AR6 Working Group III

The Second Order Draft (SOD) of the Working Group III contribution to the AR6, Climate Change 2021: Mitigation of Climate Change is now open for expert review.


The expert review of the Second Order Draft will take place from
18 January to 14 March 2021.

If you are interested in Reviewing the SOD please register until 7 March 2021 on

About the AR6 WGIII contribution

The Working Group III contribution to the AR6 assesses the mitigation of climate change, responses and solutions to the threat of dangerous climate change by reducing emissions and enhancing sinks of the greenhouse gases that are responsible for global warming. The report has a number of innovations, including a new chapter on demand, services and social aspects of mitigation, and a chapter dedicated to innovation, technology development and transfer.

During the review, experts may comment on the structure and comprehensiveness of the report and suggest improvements on the presentation of materials graphically or through tables. They may also propose revisions, relevant additional papers with full citation, and shorten text without losing relevant information.
This version includes the first drafts of the Summary for Policymakers and the Technical Summary.

Report web page:
Outline of the report:

Please note that the SOD is a confidential document which must not be distributed, cited or quoted. To register for the review, a self-declaration of expertise is required. Once the registration is complete, and before accessing the draft, reviewers agree to the terms of the review, including the confidentiality of the draft and review materials, which are provided solely for the purpose of the review.

Additional information on the role of Expert Reviewer is available in Annex 1 of Appendix A to the Principles Governing IPCC Work. Please also see here an information note explaining the Expert Review process:

If you have any questions about the process, please contact , ProClim, or Andreas Fischlin, Vice-Chair IPCC WG II.



  • Dr. Urs Neu
    ProClim − Forum sur le climat et les changements globaux (ProClim)
    Maison des Académies
    Case postale
    3001 Berne

  • Prof. Dr. Andreas Fischlin
    ETH Zürich
    Institute of Integrative Biology (IBZ)
    Systemökologie CHN E 21.1
    Universitätstrasse 16
    8092 Zürich